An inspection tool for a fingerprint module and an inspection method for a fingerprint module

Abstract

The application discloses a kind of point detection tool of fingerprint module, including support base, the middle part of the upper end of support base is fixedly installed with limiting cylinder, the middle part of the cylinder wall of the front end and rear end of limiting cylinder is movably inserted with rotating cylinder, the upper side of rotating cylinder is provided with point detection mechanism, the middle part of the upper end of point detection mechanism is provided with limiting mechanism, the middle part of the lower end of support base is provided with recycling channel, the upper side of the right part of the outer surface of limiting cylinder is provided with detection inlet, the lower part of the inner cavity of limiting cylinder is provided with recycling outlet, the middle part of the rear end of rotating cylinder is fixedly connected with through cross bar by being inserted, by setting first arc block, second arc block and third arc block, it is convenient to detect the identification condition of different contact areas of different biological fingerprint simulation prosthesis and detection module, by setting point detection mechanism, it is convenient for operator to detect the identification condition of each different kind of biological fingerprint simulation prosthesis and detection module, and the power supply of detection module does not need to be frequently connected and closed.

Description

Technical Field

[0001] This invention relates to the field of fingerprint module testing equipment, and particularly to a fingerprint module inspection fixture and a fingerprint module inspection method. Background Technology

[0002] The fingerprint module is the core component of a fingerprint lock. It is installed on devices such as fingerprint access control systems or hard drives and is used to collect and recognize fingerprints. The fingerprint module mainly consists of a fingerprint acquisition module, a fingerprint recognition module, and extended function modules (such as a lock driver module). Fingerprint modules need to be inspected on the production line to select those that meet the requirements.

[0003] After leaving the factory, fingerprint modules need to undergo performance testing, including dry finger detection, fingerprint residue detection, and false rejection rate testing. For dry finger detection, the traditional method involves placing a biometric fingerprint sculpt with worn fingers against a newly manufactured fingerprint module for identification. This is done by observing and testing multiple individuals to determine the module's ability to recognize different dry fingers. In practical applications, the pressure applied to the fingerprint module varies depending on the pressure applied. Higher pressure causes the finger to flatten, increasing the contact area with the module. This contact area affects the module's recognition performance. Traditional testing methods do not consider the varying contact areas caused by different pressure applied to the fingerprint module, which impacts recognition accuracy. Furthermore, traditional testing requires frequent power-on and power-off operations, increasing testing time and reducing efficiency. Therefore, we propose a new inspection fixture and method for fingerprint modules. Summary of the Invention

[0004] The main objective of this invention is to provide a fingerprint module inspection fixture and a fingerprint module inspection method, which can effectively solve the problems mentioned in the background art, such as the impact of the contact area between the biometric fingerprint spoof and the fingerprint module on the fingerprint module's recognition performance and the need for operators to frequently power on and off.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A fingerprint module inspection fixture includes a support base. A limiting cylinder is fixedly installed at the middle of the upper end of the support base. A rotating column is movably inserted into the middle of the front and rear end walls of the limiting cylinder. An inspection mechanism is provided on the upper side of the rotating column. A limiting mechanism is provided at the middle of the upper end of the inspection mechanism. A recycling channel is provided at the middle of the lower end of the support base. A detection inlet is provided on the upper right side of the outer surface of the limiting cylinder. A recycling outlet is provided at the lower part of the inner cavity of the limiting cylinder. A through crossbar is fixedly connected to the middle of the rear end of the rotating column.

[0007] Preferably, the left half of the inner cavity of the limiting cylinder is fixedly connected with a first arc-shaped block, a second arc-shaped block, and a third arc-shaped block from top to bottom right, and the right half of the inner cavity of the limiting cylinder is fixedly connected with a fourth arc-shaped block, wherein the thickness of the first arc-shaped block, the second arc-shaped block, and the third arc-shaped block increases progressively.

[0008] Preferably, the inspection mechanism includes a tray, a limiting groove, a support block, a module to be inspected, conductive movable rods, and a U-shaped limiting plate. The upper middle part of the tray has a limiting groove. The support block is slidably inserted into the upper part of the limiting groove wall. The module to be inspected is inserted into the upper middle part of the support block. A set of conductive movable rods is fixedly installed on both the left and right sides of the lower end of the support block. A set of conductive movable rods is fixedly connected to both the left and right sides of the lower part of the limiting groove wall. A U-shaped limiting plate is fixedly connected to the lower part of the left and right side walls of the limiting groove. The tray is fixedly inserted into the rotating column, thus fixing the inspection mechanism together with the rotating column.

[0009] Preferably, the conductive movable rod is electrically connected to the module to be tested, and a set of conductive contacts is movably sleeved at the end of the conductive movable rod away from the support block, and a set of compression springs is fixedly sleeved between the conductive contacts and the conductive movable rod.

[0010] Preferably, a set of matching grooves is provided on the left and right side walls of the inner cavity of the U-shaped limiting plate, and a set of conductive strips are fixedly connected in each matching groove. A reset spring is fixedly connected in the middle of the bottom wall of the inner cavity of the U-shaped limiting plate, and the matching grooves are matched with the conductive contacts.

[0011] Preferably, the limiting mechanism includes a support slide, a carrier slider, a biometric fingerprint simulating prosthesis, and a squeezing block. The carrier slider is slidably connected to the inner wall of the support slide. The biometric fingerprint simulating prosthesis is threadedly connected to the middle of the lower end of the carrier slider. The squeezing block is fixedly connected to the middle of the upper end of the carrier slider. The support slide and the support plate are fixedly connected to fix the limiting mechanism on the inspection mechanism.

[0012] Preferably, the top of the extrusion block is hemispherical, and an adsorption iron ring is embedded in the upper part of the inner cavity of the extrusion block.

[0013] Preferably, the recycling channel is inverted conical, and an adsorption magnet is fixedly installed in the lower part of the inner cavity of the recycling channel. A baffle is fixedly connected to the upper right side of the recycling outlet, and the upper part of the recycling channel is connected to the recycling outlet through a limiting cylinder.

[0014] Preferably, the size of the detection inlet cavity matches the size of the support slide, and a reserved notch is provided on the upper part of the side wall of the detection inlet cavity.

[0015] Preferably, a set of adjusting blocks is movably sleeved at the front end of the through crossbar, and a set of adjusting blocks is fixedly connected at the rear end of the through crossbar, wherein the adjusting blocks are equilateral triangles.

[0016] Preferably, it includes the following steps:

[0017] S1. The user holds the adjusting knobs installed on the through crossbar with both hands. The user rotates the adjusting knob with the right hand and rotates the through crossbar in the opposite direction to make the rotating column rotate. The support slide in the limiting mechanism rests against the detection inlet. The limiting mechanism installed on the inspection mechanism is aligned with the detection inlet. The carrier slider is taken out, and the bio-fingerprint simulation prosthesis is screwed onto the lower end of the carrier slider. Then, the carrier slider with the bio-fingerprint simulation prosthesis installed is placed into the support slide through the detection inlet.

[0018] S2. By rotating the adjustment block forward with the right hand, the bio-fingerprint simulation sculptor rotates with the support slide. When the support slide rotates to the first arc block, the extrusion block on the carrier slider contacts the first arc block and is extruded, thereby extruding the bio-fingerprint simulation sculptor installed at the lower end of the carrier slider. The bio-fingerprint simulation sculptor moves downward and presses against the module to be inspected on the tray in the inspection mechanism, so that the bio-fingerprint simulation sculptor presses against the module to be inspected.

[0019] S3. The tray is squeezed and moves downward, causing the conductive movable rod installed on the side of the tray to move downward as well. The downward movement of the conductive movable rod causes the conductive contact to move downward and slide into the matching groove in the U-shaped limiting plate. The return spring is squeezed to the limit position. At this time, the conductive contact contacts the conductive strip, connects the power supply to the module under test, and detects the recognition status of the module under test in recognizing the biometric fingerprint simulation spurious object.

[0020] S4. Continue to rotate the adjusting block so that the squeezing block in the limiting mechanism contacts the second arc block and the third arc block respectively. The thickness of the first arc block, the second arc block and the third arc block increases step by step, so that the degree of squeezing of the bio-fingerprint simulation stencil against the module under test gradually increases. The bio-fingerprint simulation stencil is deformed by the squeezing, so that the contact area between the bio-fingerprint simulation stencil and the module under test becomes larger and larger, thereby detecting the recognition status when the bio-fingerprint simulation stencil and the module under test are at different contact surfaces.

[0021] S5. Continue rotating the adjusting block. When the support slide cylinder moves to contact the baffle, the support slide cylinder is aligned with the recycling outlet. The adsorption iron ring inside the squeezing block is attracted by the adsorption magnet at the recycling channel, causing the carrier slider to automatically fall to the recycling outlet. The operator takes out the fallen carrier slider, unscrews out the biometric fingerprint spoof, and replaces it with the next set of biometric fingerprint spoofs installed at the lower end of the carrier slider. The carrier slider is then fed into the support slide cylinder from the detection inlet. The above operation is repeated to continue detecting the recognition status of the next set of different biometric fingerprint spoofs and the module under test at different contact areas.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In this invention, by setting a first arc-shaped block, a second arc-shaped block, and a third arc-shaped block, the thickness of the first arc-shaped block, the second arc-shaped block, and the third arc-shaped block increases progressively, thereby increasing the degree of compression between the biometric fingerprint simulation spur and the module under test, which facilitates the detection of the recognition status of the module under test and different biometric fingerprint simulation spurs under different contact areas.

[0024] By setting up an inspection mechanism with conductive contacts and a U-shaped limiting plate, when the squeezing block forces the biometric fingerprint spoofing to press down, the conductive contact slides down into the matching groove in the U-shaped limiting plate, and contacts the conductive strip, connecting the power supply to the module under test. This facilitates powering on the module for testing. When the carrier slider falls from the recycling outlet, the reset spring lifts the support block, separating the conductive contact from the conductive strip and automatically cutting off the power to the module under test. This allows operators to easily check the recognition status of different types of biometric fingerprint spoofings and the module under test without frequently switching the power on and off.

[0025] By setting a limiting mechanism, which includes a squeezing block, different squeezing forces are applied to the biometric fingerprint spoof when the squeezing block contacts the first, second, and third arc-shaped blocks. This allows for the simulation of the contact area between the biometric fingerprint spoof and the module under test when subjected to different pressures. An adsorption iron ring is set in the squeezing block, which, together with an adsorption magnet, allows the carrier slider to automatically slide to the recycling outlet. This facilitates the operator in replacing different biometric fingerprint spoofs with different ones installed on the carrier slider, allowing for the detection of different data from the module under test. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the left side of the entire invention.

[0027] Figure 2 This is a cross-sectional view of the inspection mechanism and the limiting mechanism of the present invention;

[0028] Figure 3This is a schematic diagram of the detection inlet of the present invention;

[0029] Figure 4 This is an enlarged view of point A in the present invention;

[0030] Figure 5 This is a right view of a structural schematic diagram of the present invention.

[0031] In the diagram: 1. Support base; 2. Limiting cylinder; 21. First arc-shaped block; 22. Second arc-shaped block; 23. Third arc-shaped block; 24. Fourth arc-shaped block; 3. Rotating column; 4. Inspection mechanism; 41. Pallet; 42. Limiting groove; 43. Support block; 44. Module to be inspected; 45. Conductive moving rod; 451. Conductive contact; 452. Compression spring; 46. U-shaped limiting plate; 461. Fitting groove; 462. Conductive strip block; 463. Reset spring; 5. Limiting mechanism; 51. Supporting cylinder; 52. Carrier slider; 53. Biometric fingerprint simulation prosthesis; 54. Compression block; 541. Adsorption iron ring; 6. Recycling channel; 61. Adsorption magnet; 7. Detection inlet; 71. Reserved notch; 8. Recycling outlet; 81. Baffle; 9. Through crossbar; 91. Adjusting knob. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] like Figure 1-5As shown, an inspection fixture for a fingerprint module includes a support base 1. A limiting cylinder 2 is fixedly installed at the middle of the upper end of the support base 1. A rotating column 3 is movably inserted into the middle of the front and rear cylinder walls of the limiting cylinder 2. An inspection mechanism 4 is provided on the upper side of the rotating column 3. A limiting mechanism 5 is provided at the middle of the upper end of the inspection mechanism 4. A recycling channel 6 is provided at the middle of the lower end of the support base 1. A detection inlet 7 is provided on the upper right side of the outer surface of the limiting cylinder 2. A recycling outlet 8 is provided at the lower part of the inner cavity of the limiting cylinder 2. A through crossbar 9 is inserted and fixedly connected at the middle of the rear end of the rotating column 3.

[0036] The left half of the inner cavity of the limiting cylinder 2 is fixedly connected with a first arc-shaped block 21, a second arc-shaped block 22, and a third arc-shaped block 23 from top to bottom right. The right half of the inner cavity of the limiting cylinder 2 is fixedly connected with a fourth arc-shaped block 24. The thickness of the first arc-shaped block 21, the second arc-shaped block 22, and the third arc-shaped block 23 increases progressively, so that the degree of compression between the biometric fingerprint simulation 53 and the module under test 44 increases progressively, which facilitates the detection of the recognition status of the module under test 44 and different biometric fingerprint simulation 53 under different contact areas.

[0037] The inspection mechanism 4 includes a pallet 41, a limiting groove 42, a support block 43, a module to be inspected 44, conductive movable rods 45, and a U-shaped limiting plate 46. A limiting groove 42 is formed in the middle of the upper end of the pallet 41. A support block 43 is slidably inserted into the upper part of the limiting groove 42. The module to be inspected 44 is inserted into the middle of the upper end of the support block 43. A set of conductive movable rods 45 are fixedly installed on both the left and right sides of the lower end of the support block 43. A set of conductive movable rods 45 are fixedly connected to both the left and right sides of the lower part of the limiting groove 42. The moving rod 45 and the lower part of the left and right side walls of the limiting slide 42 are both fixedly connected to U-shaped limiting plates 46. The support plate 41 is fixedly inserted into the rotating column 3, which fixes the inspection mechanism 4 to the rotating column 3. The conductive moving rod 45 is electrically connected to the module to be inspected 44. A set of conductive contacts 451 are movably sleeved at the end of the conductive moving rod 45 away from the support block 43, and a set of compression springs 452 are fixedly sleeved between the conductive contacts 451 and the conductive moving rod 45. The U-shaped limiting plate 46 is fixedly connected to the lower part of the left and right side walls of the limiting slide 42. A set of matching grooves 461 are provided on both the left and right side walls of the inner cavity of the U-shaped limiting plate 46. A set of conductive strips 462 are fixedly connected in each matching groove 461. A return spring 463 is fixedly connected in the middle of the bottom wall of the inner cavity of the U-shaped limiting plate 46. The matching grooves 461 match the conductive contacts 451. When the squeezing block 54 is squeezed and the biometric fingerprint simulation 53 is forced to press down, the conductive contacts 451 slide down into the matching grooves 461 in the U-shaped limiting plate 46. The conductive contacts 451 and the conductive strips 462 are then connected. Contact 62 connects the power supply to the module under test 44, facilitating power-on testing of the module under test 44. When the carrier slider 52 falls from the recycling outlet 8, the reset spring 463 lifts the support block 43, causing the conductive contact 451 to separate from the conductive strip 462, automatically cutting off the power supply to the module under test 44. This allows operators to easily test the recognition status of various types of biometric fingerprint simulation spurs 53 and the module under test 44, without frequently switching the power supply to the module under test 44 on and off.

[0038] The limiting mechanism 5 includes a supporting slide cylinder 51, a carrier slider 52, a biometric fingerprint simulating prosthesis 53, and a squeezing block 54. The carrier slider 52 is slidably connected to the inner wall of the supporting slide cylinder 51. The biometric fingerprint simulating prosthesis 53 is threadedly connected to the middle of the lower end of the carrier slider 52. The squeezing block 54 is fixedly connected to the middle of the upper end of the carrier slider 52. The supporting slide cylinder 51 is fixedly connected to the support plate 41 to fix the limiting mechanism 5 on the inspection mechanism 4. The top of the squeezing block 54 is hemispherical, and an adsorption iron ring 541 is embedded in the upper part of the inner cavity of the squeezing block 54. When the squeezing block 54 contacts the first arc-shaped block 21, the second arc-shaped block 22, and the third arc-shaped block 23, it applies different sizes of squeezing force to the biometric fingerprint simulating prosthesis 53, so as to simulate the contact area between the biometric fingerprint simulating prosthesis 53 and the module 44 to be inspected when subjected to different pressures.

[0039] The recovery channel 6 is an inverted cone shape, and an adsorption magnet 61 is fixedly installed in the lower part of the inner cavity of the recovery channel 6. A baffle 81 is fixedly connected to the upper right side of the recovery outlet 8. The upper part of the recovery channel 6 passes through the limiting cylinder 2 and is connected to the recovery outlet 8 to facilitate positioning the position of the support slide 51, so that the bio-fingerprint simulation 53 installed on the carrier slider 52 can fall smoothly from the recovery outlet 8.

[0040] The size of the inner cavity of the detection inlet 7 matches the size of the support slide 51, and a pre-reserved notch 71 is provided on the upper part of the side wall of the inner cavity of the detection inlet 7 to facilitate the support slide 51 to fit into the detection inlet 7, so that the carrier slider 52 with the biometric fingerprint simulation 53 installed can smoothly slide into the support slide 51.

[0041] A set of adjusting screw blocks 91 is movably sleeved at the front end of the through-bar 9, and a set of adjusting screw blocks 91 is fixedly connected at the rear end of the through-bar 9. The adjusting screw blocks 91 are equilateral triangles, which facilitates the operator to adjust the rotation limit cylinder 2. The operator holds the adjusting screw blocks 91 at the front end with both hands. The adjusting screw blocks 91 at the front end are movably sleeved on the through-bar 9. The operator adjusts the adjusting screw blocks 91 at the rear end that are fixedly installed on the through-bar 9 with the right hand, which can more accurately adjust the position of the limit cylinder 2.

[0042] Specifically, the following steps are included:

[0043] S1. The user holds the adjusting screw 91 installed on the through crossbar 9 with both hands. The user rotates the adjusting screw 91 with the right hand and rotates the through crossbar 9 in the opposite direction to make the rotating column 3 rotate. The user then places the support slide 51 in the limiting mechanism 5 against the detection inlet 7, aligning the limiting mechanism 5 installed on the inspection mechanism 4 with the detection inlet 7. The user then takes out the carrier slider 52, screws the bio-fingerprint simulation prosthesis 53 onto the lower end of the carrier slider 52, and then places the carrier slider 52 with the bio-fingerprint simulation prosthesis 53 installed into the support slide 51 through the detection inlet 7.

[0044] S2. By rotating the adjusting block 91 in the right direction, the bio-fingerprint simulation 53 rotates with the support slide 51. When the support slide 51 rotates to the first arc block 21, the squeezing block 54 on the carrier slider 52 contacts the first arc block 21 and is squeezed, thereby squeezing the bio-fingerprint simulation 53 installed at the lower end of the carrier slider 52. The bio-fingerprint simulation 53 moves downward and presses on the inspection module 44 on the tray 41 in the inspection mechanism 4, so that the bio-fingerprint simulation 53 presses on the inspection module 44.

[0045] S3. The tray 41 is squeezed and moves downward, causing the conductive movable rod 45 installed on the side of the tray 41 to move downward as well. The downward movement of the conductive movable rod 45 causes the conductive contact 451 to move downward and slide into the matching groove 461 in the U-shaped limiting plate 46. The return spring 463 is squeezed to the limit position. At this time, the conductive contact 451 contacts the conductive strip 462, turns on the power of the module under test 44, and detects the recognition status of the module under test 44 in recognizing the biometric fingerprint simulation 53.

[0046] S4. Continue to rotate the adjusting screw 91 so that the squeezing block 54 in the limiting mechanism 5 contacts the second arc block 22 and the third arc block 23 respectively. The thickness of the first arc block 21, the second arc block 22 and the third arc block 23 increases step by step, so that the degree of squeezing of the bio-fingerprint simulation 53 against the module 44 under test gradually increases. The bio-fingerprint simulation 53 is deformed by squeezing, so that the contact area between the bio-fingerprint simulation 53 and the module 44 under test becomes larger and larger, thereby detecting the recognition status when the bio-fingerprint simulation 53 and the module 44 under test have different contact surfaces.

[0047] S5. Continue rotating the adjusting block 91. When the supporting slide cylinder 51 moves to contact the baffle 81, the supporting slide cylinder 51 is aligned with the recycling outlet 8. The adsorption iron ring 541 in the squeezing block 54 is attracted by the adsorption magnet 61 at the recycling channel 6, causing the carrier slider 52 to automatically fall to the recycling outlet 8. The operator takes out the fallen carrier slider 52, unscrews out the biometric fingerprint spoof 53, and replaces the next set of biometric fingerprint spoof 53 with the lower end of the carrier slider 52. The carrier slider 52 is then fed into the supporting slide cylinder 51 from the detection inlet 7. The above operation is repeated to continue to detect the recognition status of the next set of different biometric fingerprint spoof 53 and the module 44 under test at different contact areas.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A point inspection tool for a fingerprint module, comprising a support base (1), characterized in that: The support base (1) upper end middle part is fixedly installed with a limiting cylinder (2), the limiting cylinder (2) front end and rear end cylinder wall middle part movably inserts a rotating cylinder body (3), the rotating cylinder body (3) upper side is provided with a point inspection mechanism (4), the point inspection mechanism (4) upper end middle part is provided with a limiting mechanism (5), the support base (1) lower end middle part is provided with a recycling channel (6), the limiting cylinder (2) outer surface right side upper side is provided with a detection inlet (7), the limiting cylinder (2) inner chamber lower part is provided with a recycling outlet (8), the rotating cylinder body (3) rear end middle part is fixedly connected with the through cross rod (9) inserted in the limiting cylinder (2) inner chamber left half cavity wall from top to right down in turn fixedly connected with first arc block (21), second arc block (22) and third arc block (23), the limiting cylinder (2) inner chamber right half cavity wall is fixedly connected with fourth arc block (24), the thickness of first arc block (21), second arc block (22) and third arc block (23) gradually increases;The point inspection mechanism (4) includes a supporting plate (41), a limiting sliding groove (42), a supporting block (43), a to-be-inspected module (44), a conductive movable rod (45) and a U-shaped limiting plate (46), the supporting plate (41) upper end middle part is provided with a limiting sliding groove (42), the limiting sliding groove (42) slot wall upper part is slidably inserted with a supporting block (43), the supporting block (43) upper end middle part is inserted with a to-be-inspected module (44), the supporting block (43) lower end left and right sides are both fixedly installed with a group of conductive movable rods (45), the limiting sliding groove (42) slot wall lower part left and right sides are both fixedly connected with a group of conductive movable rods (45), the limiting sliding groove (42) left and right side walls are both fixedly connected with a U-shaped limiting plate (46), the supporting plate (41) is fixedly inserted in the rotating cylinder body (3) and is fixedly connected with the point inspection mechanism (4) and the rotating cylinder body (3) together;The conductive movable rod (45) is electrically connected with the to-be-inspected module (44), the end of the conductive movable rod (45) away from the supporting block (43) is movably sleeved with a group of conductive contacts (451), and a group of extrusion springs (452) are fixedly sleeved between the conductive contact (451) and the conductive movable rod (45);The U-shaped limiting plate (46) inner chamber left and right side walls are both provided with a group of fitting sliding grooves (461), the fitting sliding groove (461) is both fixedly connected with a group of conductive strip blocks (462), the U-shaped limiting plate (46) inner chamber bottom wall middle part is fixedly connected with a reset spring (463), the fitting sliding groove (461) is matched with the conductive contact (451).

2. The point inspection tool for a fingerprint module according to claim 1, characterized in that: The limiting mechanism (5) comprises a supporting sliding cylinder (51), a carrier sliding block (52), a biological fingerprint simulation prosthesis (53) and an extrusion block (54), the supporting sliding cylinder (51) is slidably connected with the carrier sliding block (52) on the inner wall, the biological fingerprint simulation prosthesis (53) is threadedly connected with the lower end of the carrier sliding block (52), the carrier sliding block (52) is fixedly connected with the extrusion block (54) on the upper end, and the supporting sliding cylinder (51) is fixedly connected with the supporting plate (41) to fix the limiting mechanism (5) on the point inspection mechanism (4).

3. The point inspection tool for a fingerprint module according to claim 2, characterized in that: The extrusion block (54) is semispherical on the top, and an adsorbing iron ring (541) is embedded in the upper part of the inner cavity of the extrusion block (54).

4. The point inspection tool for a fingerprint module according to claim 3, characterized in that: The recovery channel (6) is inverted conical, the adsorbing magnet (61) is fixedly installed in the lower part of the inner cavity of the recovery channel (6), the baffle (81) is fixedly connected with the upper end of the recovery outlet (8), and the recovery channel (6) is in communication with the recovery outlet (8) through the limiting cylinder (2).

5. The point inspection tool for a fingerprint module according to claim 4, characterized in that: The size of the inner cavity of the detection inlet (7) is matched with the size of the supporting sliding cylinder (51), and the reserved notch (71) is formed in the upper part of the side wall of the inner cavity of the detection inlet (7).

6. The point inspection tool of the fingerprint module according to claim 5, characterized in that: A group of adjusting knobs (91) are movably sleeved with the front end of the through horizontal rod (9), a group of adjusting knobs (91) are fixedly connected with the rear end of the through horizontal rod (9), and the adjusting knobs (91) are equilateral triangles.

7. A method for inspecting a fingerprint module, using the tool for inspecting a fingerprint module according to claim 6, characterized in that, Specifically comprising the following steps: S1, the user holds the adjusting knobs (91) installed on the through horizontal rod (9) with both hands, rotates the adjusting knobs (91) with the right hand, reversely rotates the through horizontal rod (9) to make the rotating cylinder (3) rotate, makes the supporting sliding cylinder (51) in the limiting mechanism (5) lean on the detection inlet (7), makes the limiting mechanism (5) installed on the point inspection mechanism (4) align with the detection inlet (7), takes out the carrier sliding block (52), threadedly connects the biological fingerprint simulation prosthesis (53) with the lower end of the carrier sliding block (52), and places the carrier sliding block (52) with the installed biological fingerprint simulation prosthesis (53) into the supporting sliding cylinder (51) through the detection inlet (7); S2, the biological fingerprint simulation prosthesis (53) rotates with the supporting sliding cylinder (51) by rotating the adjusting knobs (91) with the right hand, when the supporting sliding cylinder (51) rotates to the first arc-shaped block (21), the extrusion block (54) on the carrier sliding block (52) is in contact with the first arc-shaped block (21) and is extruded, so as to extrude the biological fingerprint simulation prosthesis (53) installed on the lower end of the carrier sliding block (52), the biological fingerprint simulation prosthesis (53) moves downward and presses on the to-be-inspected module (44) on the supporting plate (41) in the point inspection mechanism (4), so that the biological fingerprint simulation prosthesis (53) is pressed on the to-be-inspected module (44); S3, the supporting plate (41) is pressed downward, so that the conductive movable rod (45) installed on the side of the supporting plate (41) moves downward, the conductive movable rod (45) moves downward, so that the conductive contact (451) moves downward and slides into the matching sliding groove (461) in the U-shaped limiting plate (46), the reset spring (463) is pressed to the limit position, at this time the conductive contact (451) contacts the conductive block (462), the to-be-tested module (44) is connected to the power supply, and the identification state of the to-be-tested module (44) identifying the biological fingerprint simulation prosthesis (53) is detected; S4, continue to rotate the adjusting block (91), so that the pressing block (54) in the limiting mechanism (5) respectively contacts the second arc-shaped block (22) and the third arc-shaped block (23), the thicknesses of the first arc-shaped block (21), the second arc-shaped block (22) and the third arc-shaped block (23) gradually increase, so that the degree of pressing the to-be-tested module (44) by the biological fingerprint simulation prosthesis (53) gradually increases, and the biological fingerprint simulation prosthesis (53) is deformed by being pressed, so that the contact area between the biological fingerprint simulation prosthesis (53) and the to-be-tested module (44) becomes larger and larger, thereby the identification state of the biological fingerprint simulation prosthesis (53) and the to-be-tested module (44) at different contact surfaces is detected; S5, continue to rotate the adjusting block (91), when the supporting sliding cylinder (51) moves to contact the baffle (81), at this time the supporting sliding cylinder (51) is aligned with the recovery outlet (8), the adsorbing iron ring (541) in the pressing block (54) is adsorbed by the adsorbing magnet (61) at the recovery channel (6), so that the carrier sliding block (52) automatically falls to the recovery outlet (8), the operator takes out the falling carrier sliding block (52), rotates the biological fingerprint simulation prosthesis (53), and installs the next group of biological fingerprint simulation prostheses (53) at the lower end of the carrier sliding block (52).

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